Police executed a search warrant on Ms Vulin's unit in September 2011, discovering more than 20 grams of methylamphetamine and a suite of other illicit substances including LSD and cocaine, the Perth Magistrates Court heard.

Police also discovered several empty clip seal bags and scales commonly used to weigh drugs.

Five months later Ms Vulin was allegedly attacked in the same home - doused in petrol and set alight.

Ms Vulin's lawyer Lana Paxman applied for a spent conviction order, arguing recorded convictions could prevent her client from travelling to China or the United States for burns therapies not available in Australia.

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She said Ms Vulin was "physically incapable" of reoffending, requiring constant care, while she received painful rehabilitation treatment for her burns.

"She is required to wear a pressure suit all day and night," Ms Paxman said.

"She is completely reliant on others to care for her.

"She can't even go to the toilet on her own let alone pack a meth pipe and light it."

Before the fire attack Ms Vulin had started seeing a drugs counsellor, Ms Paxman said.

Chief Magistrate Steven Heath said the quantity and seriousness of the drugs ruled out a spent conviction.

But he found imprisonment was not a practical option for Ms Vulin given her medical condition.